Toán Lớp 6: Tìm x biết: 240:(x−5)=2^2.5^2−20
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Toán Lớp 6: Tìm x biết: 240:(x−5)=2^2.5^2−20
Comments ( 2 )
Giải đáp:
240:(x−5)=2^2. 5^2−20
-> 240 : (x – 5) = 4 . 25 – 20
-> 240 : (x – 5) = 100 – 20
-> 240 : (x – 5) = 80
-> x – 5 = 240 : 80
-> x – 5 = 3
-> x = 3 + 5
-> x = 8
Vậy x = 8
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240:(x−5)=2^2 . 5^2−20
->240:(x-5)=4 . 25-20
->240:(x-5)=100-20
->240:(x-5)=80
->x-5=240:80
->x-5=3
->x=3+5
->x=8
Vậy x=8